<div class="example-wrapper">
    <div class="example-header">
        
            <button style="margin: 6px;" onclick="changeSelection('normal')"> Normal </button>
            
            <button style="margin: 6px;" onclick="changeSelection('single')"> Remove Single Children </button>
    
            <button style="margin: 6px;" onclick="changeSelection('lowest')"> Remove Lowest Single Children </button>
    </div>
    <div id="myGrid" class="ag-theme-quartz"></div>
</div>